[PATCH v6 15/25] rcar-vin: add flag to switch to media controller mode

[Niklas Söderlund]

On Gen3 a media controller API needs to be used to allow userspace to
configure the subdevices in the pipeline instead of directly controlling
a single source subdevice, which is and will continue to be the mode of
operation on Gen2.

Prepare for these two modes of operation by adding a flag to struct
rvin_graph_entity which will control which mode to use.

Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 6 +++++-
 drivers/media/platform/rcar-vin/rcar-vin.h  | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c 
b/drivers/media/platform/rcar-vin/rcar-core.c
index 65f01b6781c0aefd..fbbb22924cf3a045 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -279,18 +279,21 @@ static int rvin_digital_graph_init(struct rvin_dev *vin)
 
 static const struct rvin_info rcar_info_h1 = {
        .chip = RCAR_H1,
+       .use_mc = false,
        .max_width = 2048,
        .max_height = 2048,
 };
 
 static const struct rvin_info rcar_info_m1 = {
        .chip = RCAR_M1,
+       .use_mc = false,
        .max_width = 2048,
        .max_height = 2048,
 };
 
 static const struct rvin_info rcar_info_gen2 = {
        .chip = RCAR_GEN2,
+       .use_mc = false,
        .max_width = 2048,
        .max_height = 2048,
 };
@@ -387,7 +390,8 @@ static int rcar_vin_remove(struct platform_device *pdev)
        v4l2_async_notifier_unregister(&vin->notifier);
 
        /* Checks internaly if handlers have been init or not */
-       v4l2_ctrl_handler_free(&vin->ctrl_handler);
+       if (!vin->info->use_mc)
+               v4l2_ctrl_handler_free(&vin->ctrl_handler);
 
        rvin_v4l2_remove(vin);
 
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h 
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 94c606f2b8f2f246..819d9c04ed8ffb36 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -77,12 +77,14 @@ struct rvin_graph_entity {
 /**
  * struct rvin_info - Information about the particular VIN implementation
  * @chip:              type of VIN chip
+ * @use_mc:            use media controller instead of controlling subdevice
  *
  * max_width:          max input width the VIN supports
  * max_height:         max input height the VIN supports
  */
 struct rvin_info {
        enum chip_id chip;
+       bool use_mc;
 
        unsigned int max_width;
        unsigned int max_height;
-- 
2.14.0